| No. | Item | Definition |
|---|---|---|
| 1. | a few cards short | mentally lacking or odd |
| 2. | absurd | wildly unreasonable or foolish |
| 3. | addlebrained | stupidly confused |
| 4. | addlepated | foolishly confused |
| 5. | airheaded | scatterbrained and unintelligent |
| 6. | asinine | extremely foolish |
| 7. | balmy | foolish or eccentric |
| 8. | barmy | foolish or crazy |
| 9. | benighted | lacking knowledge or understanding |
| 10. | birdbrained | foolishly stupid |
| 11. | blank | showing no understanding |
| 12. | blockheaded | stupid and stubborn |
| 13. | boneheaded | stupid in an obvious way |
| 14. | brainless | having no common sense |
| 15. | callow | immature and inexperienced |
| 16. | careless | not giving enough thought |
| 17. | clueless | completely unaware or confused |
| 18. | crackbrained | crazy or foolish |
| 19. | credulous | too ready to believe |
| 20. | cretinous | very stupid |
| 21. | daft | silly or foolish |
| 22. | dense | slow to understand |
| 23. | dim | not mentally sharp |
| 24. | dippy | silly or foolish |
| 25. | doltish | stupid and awkward |
| 26. | dopey | stupid or silly |
| 27. | dotty | slightly foolish or eccentric |
| 28. | dull | not quick to understand |
| 29. | empty-headed | lacking intelligence or judgment |
| 30. | fatuous | silly and pointless |
| 31. | feeble-minded | lacking mental strength |
| 32. | foolhardy | recklessly foolish |
| 33. | foolish | showing poor judgment |
| 34. | goofy | silly or foolish |
| 35. | gormless | lacking sense or initiative |
| 36. | green | inexperienced and naive |
| 37. | gullible | easily fooled; not very smart |
| 38. | half-witted | very foolish or stupid |
| 39. | ham-fisted | clumsy and foolish |
| 40. | harebrained | rashly foolish |
| 41. | heedless | showing no care or thought |
| 42. | hopeless | beyond sensible improvement |
| 43. | idiotic | extremely stupid |
| 44. | idiotical | extremely stupid |
| 45. | ignorant | lacking knowledge or awareness |
| 46. | ill-advised | showing poor judgment |
| 47. | imbecilic | very stupid |
| 48. | inane | silly and meaningless |
| 49. | irrational | not based on reason |
| 50. | jejune | naively simplistic |
| 51. | laughable | ridiculously foolish |
| 52. | loopy | silly or irrational |
| 53. | ludicrous | foolishly unreasonable |
| 54. | lumpish | awkward and dull |
| 55. | madcap | wildly foolish |
| 56. | mindless | showing no thought |
| 57. | moronic | extremely foolish or stupid |
| 58. | muddleheaded | confused and stupid |
| 59. | mute | unable or unwilling to speak |
| 60. | myopic | lacking foresight |
| 61. | naive | showing lack of worldly judgment |
| 62. | nitwitted | foolishly stupid |
| 63. | nonsensical | having no sensible meaning |
| 64. | not all there | mentally dull or odd |
| 65. | not too bright | not very intelligent |
| 66. | nutty | foolish or crazy |
| 67. | oafish | stupid and awkward |
| 68. | obtuse | slow to grasp meaning |
| 69. | out to lunch | mentally absent or foolish |
| 70. | pathetic | pitifully foolish |
| 71. | pea-brained | very stupid |
| 72. | pig-ignorant | extremely ignorant |
| 73. | pinheaded | stupid in a petty way |
| 74. | pitiful | deserving contempt or pity |
| 75. | preposterous | absurdly foolish |
| 76. | reckless | carelessly foolish |
| 77. | ridiculous | foolishly unreasonable |
| 78. | sappy | foolishly sentimental or silly |
| 79. | screwball | foolishly odd |
| 80. | senseless | showing no good sense |
| 81. | silly | showing poor sense |
| 82. | simple-minded | lacking subtle thought |
| 83. | slow-witted | slow to understand things |
| 84. | stolid | showing little thought or feeling |
| 85. | stupid | lacking intelligence or sense |
| 86. | thick | slow to understand |
| 87. | thickheaded | slow to understand |
| 88. | thoughtless | showing little consideration or thought |
| 89. | unintelligent | not intelligent |
| 90. | unreasonable | not sensible or fair |
| 91. | unschooled | not educated or informed |
| 92. | unsmart | not smart |
| 93. | unthinking | not using thought or judgment |
| 94. | unwise | not showing good judgment |
| 95. | vacant | showing no thought |
| 96. | vacuous | empty-headed or unintelligent |
| 97. | vapid | dull and unintelligent |
| 98. | wacky | oddly foolish |
| 99. | witless | lacking intelligence or sense |
| 100. | zany | comically foolish |